I have an 18" Ballistic Advantage Premium SS SPR barrel in .223 Wylde that I think I’ve put around 80 rounds through. All I did was sight in, get some groups and then moved on to the next project.
Barrel is in near new shape. You get a gas block and black gas tube too! The roll pin was a pain to get into the gas block/tube, so there is some marks from my punch. Gas block is Odin Works, tube is a black Rainier Arms.
$150 shipped.
http://ballisticadvantage.com/18-inch-223-wylde-spr-mid-length-ss-premium-barrel-ops12.html
BA SPR by Damage Photos, on Flickr
SPR by BA by Damage Photos, on Flickr